iXpand base not working on iOS 11.3.1

Mobile Accessories SanDisk iXpand™ Base
2

I have the same issue.

I got my iXpand Base 64 GB as a gift on April.  It worked perfectly on April.  It charged and back up my iPad Pro and iPhone 7 +.

Now, it only works on my iPhone 7 +.  My iPad Pro shows not connected and not charging.